diff --git a/src/lib/viewers/doc/_docBase.scss b/src/lib/viewers/doc/_docBase.scss
index 90a7256e4..217a26c36 100644
--- a/src/lib/viewers/doc/_docBase.scss
+++ b/src/lib/viewers/doc/_docBase.scss
@@ -14,7 +14,8 @@ $thumbnail-sidebar-width: 226px;
 }
 
 .bp {
-    .bp-toggle-thumbnails-icon {
+    .bp-toggle-thumbnails-icon,
+    .bp-ThumbnailsToggle {
         display: none;
     }
 
@@ -171,7 +172,8 @@ $thumbnail-sidebar-width: 226px;
             }
         }
 
-        .bp-controls-btn.bp-toggle-thumbnails-icon {
+        .bp-controls-btn.bp-toggle-thumbnails-icon,
+        .bp-ThumbnailsToggle {
             display: block;
         }
     }
@@ -375,7 +377,8 @@ $thumbnail-sidebar-width: 226px;
     }
 
     // Hide the toggle thumbnails button when in fullscreen
-    &.bp-is-fullscreen .bp-toggle-thumbnails-icon {
+    &.bp-is-fullscreen .bp-toggle-thumbnails-icon,
+    &.bp-is-fullscreen .bp-ThumbnailsToggle {
         display: none;
     }
 }